PORSCHE 718 SPYDER (2021)
Running costs, reliability data, and common problems from 125 real MOT tests.
Annual Cost
£2,042
£170/month
MOT Pass Rate
98%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 35-50
3995cc Petrol
Great Choice
98% pass rate, £2042/year to run. 16 points above average.
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Annual Running Costs
~30 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 16 points above the national average of 82%. It also outperforms the PORSCHE brand average of 92%.
At 5 years old, 98% of PORSCHE 718 SPYDERs from 2021 passed their MOT first time in 2026. That's based on 125 tests across the UK. The average mileage at this age is 9,096 miles.
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How Does It Compare?
Mileage Analysis
9,096
Average miles
37,000
Expected for age
The average 2021 PORSCHE 718 SPYDER has 9,096 miles on the clock, which is significantly below the expected 37,000 miles for a 5-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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Best Year to Buy?
The most reliable year is the 2019 model with a 99% MOT pass rate, while the 2021 model has the lowest at 98%. Consider a different year if reliability is a priority.
PORSCHE 718 SPYDER by Year
Similar Cars to Consider
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About the 2021 PORSCHE 718 SPYDER
The 2021 PORSCHE 718 SPYDER is a luxury with a 3995cc petrol engine. 125 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 7% of all 2021 cars for reliability.
With an average of 9,096 miles at 5 years old, PORSCHE 718 SPYDER owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2021 PORSCHE 718 SPYDER Fuel Costs
The 3995cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 PORSCHE 718 SPYDER?
Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
PORSCHE 718 SPYDER Reliability Trend
The PORSCHE 718 SPYDER has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.
Buying a Used 2021 PORSCHE 718 SPYDER
At 5 years old, the PORSCHE 718 SPYDER offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.
Common Issues to Watch For
Based on the 2021 PORSCHE 718 SPYDER's fuel type, age, and engine size, these are the most likely problem areas to check.
Oil Consumption
Low riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2021 PORSCHE 718 SPYDER stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| PORSCHE 718 SPYDER(2021) | 98% | £1592 | £195 | Grp 35-50 | £2042 |
| MERCEDES C(2019) | 91% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE CAYENNE(2019) | 95% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| PORSCHE 911(2019) | 97% | £1592 | £190 | Grp 35-50 | £2037-£5 |
| AUDI A6(2020) | 94% | £1592 | £190 | Grp 35-50 | £2037-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Porsche Models
Explore other Porsche cars or similar models in the same category.
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PORSCHE CAYENNE
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PORSCHE 911
2018 · 3996cc Petrol
MERCEDES C
2019 · 3982cc Petrol
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